...rotvino) • D. Zeppenfeld (University of Karlsruhe, Germany) • P. Zerwas (DESY) • C. Zhang (IHEP, Beijing) • K. Zuber (Oxford University) 4. Naming scheme for hadrons We introduced in the 1986 edition =-=[2]-=- a new naming scheme for the hadrons. Changes from older terminology affected mainly the heavier mesons made of u, d, and s quarks. Otherwise, the only important change to known hadrons was that the F...

...ty (it is somewhere between N k and N k−1), we July 6, 2006 13:59Introduction 13 do not know how to evaluate this expression. Instead we define S 2 r = 1 N k N k ∑ k=1 ( ) 2 Rrk − Rr 〈(Rrk − Rr) 2 . =-=(4)-=- 〉 With this definition the expected value of S 2 r is one. We can show that 〈(R rk − Rr) 2 〉 =(δR rk) 2 − (δRr) 2 , (5) where δRr is the fitted error for ratio r. The fit is redone using errors for t...

...rties, called the “Particle Listings.” These Listings include 2,633 new measurements from 689 papers, in addition to the 21,926 measurements from 6,415 papers that first appeared in previous editions =-=[1]-=-. Both books include Summary Tables with our best values and limits for particle properties such as masses, widths or lifetimes, and branching fractions, as well as an extensive summary of searches fo...